What's up and in a star? What happens in an active galactic core? Answering these questions is the goal of a proposed huge interferometer on the moon. It is called Artemis-capable Stellar Imagator (Aesi) and would use a series of 15-30 optical/ultraviolet sensitive telescopes in a 1 km-en-enliptical array via the moon surface.
An American team of scientists and engineers under the direction of Dr. Kenneth Carpenter at the NASA Goddard Spaceflight Center, which works in cooperation with Goddard's integrated design center, has just completed a 9-month feasibility study for Aesi and published its results. The study was financed by the NAC program (innovative advanced concepts) of NASA, with which scientists and engineers can examine visionary ideas for future programs.
Aesi is based on an earlier concept for a freely flying UV/optical interior interferometer called Stellar Imager (Si). According to Carpenter, they observed the constant progress in the Artemis campaign of NASA to establish habitats and to support the infrastructure on the lunar surface. The idea of a moon -based facility looked much more practical and competitive with the free flyer. “We proposed NASA innovative Advanced Concepts (NIAC) program of NASA to develop a variant of the SI concept with the name Artemis-capable Stellar Imager (Aesi), which may be built, used and operated in cooperation with the Artemis campaign,” he said.
Artemis options and an interferometer
The proposed return of NASA via Artemis missions offers astronomers the opportunity to use an interferometer and other telescopes. This would continue for an environment supported by Artemis infrastructure and free of some of the restrictions that earthly or spatial-based arrays can experience.
The study financed by Niac focuses on a number of scientific goals. It is said: “This mission would enable revolutionary science, including: imaging of the surfaces of the nearby (~ 4 PC) solar type stars and further away (> 2 KPC) super giants, in order to make magnetically driven activities (plagues, star spots, convection), imaging accretion discs around the determined stars and the resolution of the central motors of the central Motorzine of Galactic Nangeln (Agnine “(Agnine” (Agnine “(Agnine”.
The imaging of the surfaces of stars gives the activities deep inside. If these stars of the sun are similar (i.e. main sequence stars), this would give a deeper insight into what our next star does. Aesi observations will also help scientists to understand the Dynamo activity that drives the magnetic activity of the sun and other stars according to Carpenter. “Our proposed primary examination of sun-like stars uses a combination of star imaging with high spatial resolution to observe the cyclical time development of surface manifestations of the magnetic activity and the high time and the spatial dissolution of asteroseism in order to obtain the inner star structure in order to create the information in order to create really predictive models of Solar/Stellar magnetics, and and Creating the information, building solar/stellare magnetic activity, “he said.
Immerse yourself with stars from the moon
Let's look at a brief summary of the possible goals of the Aesi. It could examine such main stars as Alpha Centauri A, Procyon A, Sirius A and Epsilon Eridani to collect details of their surface activities and the magnetic activity that drives them. This interferometric data could then be coupled with spatially resolved asterose ice creamology studies in order to give more detailed insights into exactly what happens in these stars. In addition, scientists could help to understand how stellar activities influence the existence and habitability of their planets.
In the understanding of what happens to these stars (and effects on the sun), interferometriest studies would also have immediate applicability to predict the solar activity and its effects on earth here. Aesi would offer high -spatial and temporal resolution of imaging capabilities that give us a look at star surfaces and the way they vary through a magnet cycle. Scientists could “see” magnetically powered activities such as star spots (similar to sun spots), hot plagues and convection activities. Active regions about the sun and other stars are very bright. On the sun, they dominate wavelengths of light that are most important to predict the effects of the sun activity on its surround planets, including the earth.
Simulations of Aesi observations of stars and the hearts of AGN. With the kind permission of NASA.
Examination of complex and distant objects
The AESI installation on the moon would also offer very detailed overviews of accretion panes around other stars. These regions can be difficult to observe in detail. This is because you can often swap your star hard. Supernovae are another well -known goal, in particular the ejecta from the catastrophic explosions that end the life of super massif stars. Aesi can help astronomers recognize the growing debris clouds in the earliest stages of a supernova outflow.
Aesi should also be able to present the complex events in active galactic cores. In particular, Agn winds seem to exist to exist most of these objects. Your speeds and the amount of mass loss have indications of the structure of the object in the heart of the galaxy. Aesi measurements of these regions can also contribute to more precise distance for such objects (quasare) and measure the cosmological constant. Such studies will need the ability of an extended Aesi array, said Carpenter. “Due to the distance of the brightest AGNS, we would need large external array diameters to dissolve the regions around the central engines, which are probably the only parts that are bright enough to be successfully recognized by Aesi,” he said. “We examine opportunities to increase the UV sensitivity of AESI by possibly using mirror coatings with higher UV reflection assets than currently possible, improved UV detectors and possibly larger mirror elements. These improvements would improve our ability to examine a wider sample of AGNS and more parts of individual parts.”
Implementation of the Aesi
The basic mission design for Aesi depends on use by astronauts and/or robots during the upcoming Artemis missions. Each element in the array is a one-meter telescope that is used on a small rover. The array extends or processes for certain observations as required. Data from the array are collected and reconstructed by a central beam combinations “Hub” to create images of its target stars or other objects.
Artist reproduction of one of the primary mirror elements that lead a beam to the central hub. (Credit: Britt Griswold)
The moon presents a very good, stable environment for Aesi. It has no atmosphere to confuse the view for the telescopes, which means that adaptive optics are not needed to correct the air movement. This also means that the interferometer can work with much shorter wavelengths than with any earth's array. Taking two challenges into account (apart from the delivery of the telescopes and the supportive hardware and the actual construction process) are dust and seismic movement during moon quakes. However, these can be treated.
Now we are waiting for Artemis
If this mission concept is selected by NASA for implementation, the biggest question will be: when and where is it used? It all depends on the progress of Artemis campaign and the skills that it could provide for neighboring observatories. The first occupation mission is currently only taking place in spring 2026 (at the earliest). Follow -up flights will set up more infrastructure, and the cadence for these flights remains unknown. Realistically speaking, the earliest Aesi could be implemented the late 2030s or early 2040s.
The team suggests where the interferometer is used and proposes the team that several moon -south pole locations, preferably near the previous Artemis infrastructure, enable easy access through Artemis Astronauts or robots. However, the possibility of localizing in other distant, lower latitudes is also of interest if Artemis could support this because it would enable more sky observations. The next steps for the Aesi team are the technology required for the interferometer more F&E and to examine other scientific studies to which it can be adapted.
More information
NASA Innovative Advanced Concepts Phase I Final Report-a Langar Long-term UV/Optical Imaging interferometer: Artemis-capable star Imager (Aesi)
Aesi Artemis enabled a star image
A Langar long-baseline interferometer for optical imaging: Artemis-capable constellation (Aesi)
